package com.ruiyian.common.utils.file;

import java.io.*;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.ArrayUtils;
import com.ruiyian.common.config.RuoYiConfig;
import com.ruiyian.common.utils.DateUtils;
import com.ruiyian.common.utils.StringUtils;
import com.ruiyian.common.utils.uuid.IdUtils;

/**
 * 文件处理工具类
 *
 * @author ruiyian
 */
public class FileUtils
{
    public static String FILENAME_PATTERN = "[a-zA-Z0-9_\\-\\|\\.\\u4e00-\\u9fa5]+";

    /**
     * 输出指定文件的byte数组
     *
     * @param filePath 文件路径
     * @param os 输出流
     * @return
     */
    public static void writeBytes(String filePath, OutputStream os) throws IOException
    {
        FileInputStream fis = null;
        try
        {
            File file = new File(filePath);
            if (!file.exists())
            {
                throw new FileNotFoundException(filePath);
            }
            fis = new FileInputStream(file);
            byte[] b = new byte[1024];
            int length;
            while ((length = fis.read(b)) > 0)
            {
                os.write(b, 0, length);
            }
        }
        catch (IOException e)
        {
            throw e;
        }
        finally
        {
            IOUtils.close(os);
            IOUtils.close(fis);
        }
    }
    /***
     * 读取文件内容 .msg  =分割
     * @param fileName
     * @return
     */
    public static Map<String, Object> readFileContent(String fileName) {
        File file = new File(fileName);
        BufferedReader reader = null;
        Map<String, Object> data = Maps.newHashMap();
        try {
            reader = new BufferedReader(new FileReader(file));
            String tempStr;
            while ((tempStr = reader.readLine()) != null) {
                if (tempStr.indexOf("=") != -1) {
                    int i = tempStr.indexOf("=");
                    data.put(tempStr.substring(0, i), tempStr.substring(i + 1, tempStr.length()));
                } else {
                    data.put(tempStr, "");
                }
            }
            reader.close();
        } catch (IOException e) {
        } finally {
            if (reader != null) {
                try {
                    reader.close();
                } catch (IOException e1) {
                }
            }
        }
        return data;
    }

    /**
     * 写数据到文件中
     *
     * @param data 数据
     * @return 目标文件
     * @throws IOException IO异常
     */
    public static String writeImportBytes(byte[] data) throws IOException
    {
        return writeBytes(data, RuoYiConfig.getImportPath());
    }

    /**
     * 写数据到文件中
     *
     * @param data 数据
     * @param uploadDir 目标文件
     * @return 目标文件
     * @throws IOException IO异常
     */
    public static String writeBytes(byte[] data, String uploadDir) throws IOException
    {
        FileOutputStream fos = null;
        String pathName = "";
        try
        {
            String extension = getFileExtendName(data);
            pathName = DateUtils.datePath() + "/" + IdUtils.fastUUID() + "." + extension;
            File file = FileUploadUtils.getAbsoluteFile(uploadDir, pathName);
            fos = new FileOutputStream(file);
            fos.write(data);
        }
        finally
        {
            IOUtils.close(fos);
        }
        return FileUploadUtils.getPathFileName(uploadDir, pathName);
    }

    /**
     * 删除文件
     *
     * @param filePath 文件
     * @return
     */
    public static boolean deleteFile(String filePath)
    {
        boolean flag = false;
        File file = new File(filePath);
        // 路径为文件且不为空则进行删除
        if (file.isFile() && file.exists())
        {
            file.delete();
            flag = true;
        }
        return flag;
    }

    /**
     * 文件名称验证
     *
     * @param filename 文件名称
     * @return true 正常 false 非法
     */
    public static boolean isValidFilename(String filename)
    {
        return filename.matches(FILENAME_PATTERN);
    }

    /**
     * 检查文件是否可下载
     *
     * @param resource 需要下载的文件
     * @return true 正常 false 非法
     */
    public static boolean checkAllowDownload(String resource)
    {
        // 禁止目录上跳级别
        if (StringUtils.contains(resource, ".."))
        {
            return false;
        }

        // 检查允许下载的文件规则
        if (ArrayUtils.contains(MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION, FileTypeUtils.getFileType(resource)))
        {
            return true;
        }

        // 不在允许下载的文件规则
        return false;
    }

    /**
     * 下载文件名重新编码
     *
     * @param request 请求对象
     * @param fileName 文件名
     * @return 编码后的文件名
     */
    public static String setFileDownloadHeader(HttpServletRequest request, String fileName) throws UnsupportedEncodingException
    {
        final String agent = request.getHeader("USER-AGENT");
        String filename = fileName;
        if (agent.contains("MSIE"))
        {
            // IE浏览器
            filename = URLEncoder.encode(filename, "utf-8");
            filename = filename.replace("+", " ");
        }
        else if (agent.contains("Firefox"))
        {
            // 火狐浏览器
            filename = new String(fileName.getBytes(), "ISO8859-1");
        }
        else if (agent.contains("Chrome"))
        {
            // google浏览器
            filename = URLEncoder.encode(filename, "utf-8");
        }
        else
        {
            // 其它浏览器
            filename = URLEncoder.encode(filename, "utf-8");
        }
        return filename;
    }

    /**
     * 下载文件名重新编码
     *
     * @param response 响应对象
     * @param realFileName 真实文件名
     * @return
     */
    public static void setAttachmentResponseHeader(HttpServletResponse response, String realFileName) throws UnsupportedEncodingException
    {
        String percentEncodedFileName = percentEncode(realFileName);

        StringBuilder contentDispositionValue = new StringBuilder();
        contentDispositionValue.append("attachment; filename=")
                .append(percentEncodedFileName)
                .append(";")
                .append("filename*=")
                .append("utf-8''")
                .append(percentEncodedFileName);

        response.setHeader("Content-disposition", contentDispositionValue.toString());
        response.setHeader("download-filename", percentEncodedFileName);
    }

    /**
     * 百分号编码工具方法
     *
     * @param s 需要百分号编码的字符串
     * @return 百分号编码后的字符串
     */
    public static String percentEncode(String s) throws UnsupportedEncodingException
    {
        String encode = URLEncoder.encode(s, StandardCharsets.UTF_8.toString());
        return encode.replaceAll("\\+", "%20");
    }

    /**
     * 获取图像后缀
     *
     * @param photoByte 图像数据
     * @return 后缀名
     */
    public static String getFileExtendName(byte[] photoByte)
    {
        String strFileExtendName = "jpg";
        if ((photoByte[0] == 71) && (photoByte[1] == 73) && (photoByte[2] == 70) && (photoByte[3] == 56)
                && ((photoByte[4] == 55) || (photoByte[4] == 57)) && (photoByte[5] == 97))
        {
            strFileExtendName = "gif";
        }
        else if ((photoByte[6] == 74) && (photoByte[7] == 70) && (photoByte[8] == 73) && (photoByte[9] == 70))
        {
            strFileExtendName = "jpg";
        }
        else if ((photoByte[0] == 66) && (photoByte[1] == 77))
        {
            strFileExtendName = "bmp";
        }
        else if ((photoByte[1] == 80) && (photoByte[2] == 78) && (photoByte[3] == 71))
        {
            strFileExtendName = "png";
        }
        return strFileExtendName;
    }

    /***
     * 读取文件内容 .dat  /t分割
     * @param fileName
     * @return
     */
    public static List<Map<String, Object>> readDatFileContent(String fileName) {
        File file = new File(fileName);
        BufferedReader reader = null;
        List<Map<String, Object>> list = new ArrayList<>();
        try {
//            reader = new BufferedReader(new FileReader(file));
            InputStreamReader isr = new InputStreamReader(new FileInputStream(file), "UTF-8");
            reader = new BufferedReader(isr);
            String tempStr;
            int i = 0;
            while ((tempStr = reader.readLine()) != null) {
                i++;
                if (i == 1) {
                    continue;
                } else {
                    Map<String, Object> data = Maps.newHashMap();
                    String[] split = tempStr.split("\\t");
                    for (int j = 0; j < split.length; j++) {
                        data.put("var" + j, split[j]);
                    }
                    list.add(data);
                }
            }
            reader.close();
        } catch (IOException e) {
        } finally {
            if (reader != null) {
                try {
                    reader.close();
                } catch (IOException e1) {
                }
            }
        }
        return list;
    }

    /*
     * 读取指定路径下的文件名和目录名
     */
    public static List<String> getFileList(String path) {
        List<String> data = Lists.newArrayList();
        File file = new File(path);
        File[] fileList = file.listFiles();
        for (int i = 0; i < fileList.length; i++) {
            if (fileList[i].isFile()) {
                String fileName = fileList[i].getName();
                data.add(fileName);
                System.out.println("文件：" + fileName);
            }
            if (fileList[i].isDirectory()) {
                String fileName = fileList[i].getName();
                System.out.println("目录：" + fileName);
            }
        }
        return data;
    }

    public static void writeDatFile(List<Object> list, String fileName) throws Exception {
        FileOutputStream fos = null;
        ObjectOutputStream oos = null;
        try {
            fos = new FileOutputStream(fileName);
            oos = new ObjectOutputStream(fos);
            for (int i = 0; i < list.size(); i++) {
                oos.writeObject(list.get(i));
                oos.flush();
            }
        } catch (Exception e) {
            System.out.println(e.getMessage());
        } finally {
            if (oos != null) {
                oos.close();
            }
            if (fos != null) {
                fos.close();
            }
        }
    }

    /**
     * 创建文件夹 写入文件
     * @param file 文件路径
     * @param fileName 文件名
     * @param list  数据
     */
    public static void circleMethod(File file,String fileName,List<Map<String,String>> list) {
        if (!file.exists()) {
            file.mkdirs();
        }
        if (file.isDirectory()) {
            createFile(file,fileName,list);
           /* File[] fileList = file.listFiles();
            for (int i = 0; i < fileList.length; i++) {
                circleMethod(fileList[i],fileName);
            }*/
        }
    }

    public static void circleMsgMethod(File file,String fileName,List<String> list) {
        if (!file.exists()) {
            file.mkdirs();
        }
        if (file.isDirectory()) {
            createMsgFile(file,fileName,list);
           /* File[] fileList = file.listFiles();
            for (int i = 0; i < fileList.length; i++) {
                circleMethod(fileList[i],fileName);
            }*/
        }
    }

    /**
     * 写入数据
     * @param file
     * @param fileName
     */
    public static void createFile(File file,String fileName,List<Map<String,String>> list) {
        String nameDir = file.getAbsoluteFile()+File.separator+fileName;
        File nowFile = new File(nameDir);
        if(nowFile.exists()){
            nowFile.delete();
        }
        BufferedWriter writer = null;
        try {
            writer = new BufferedWriter(new FileWriter(nameDir, true));
        } catch (Exception e) {
            e.printStackTrace();
        }
        for(Map<String,String> str: list){
            for (int i=0;i<str.size();i++) {
                try {
                    writer.write(String.valueOf(str.get("var"+i)));
                    writer.write("\t");
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            try {
                writer.newLine();//写入文件
                writer.flush();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        try {
            writer.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }


    public static void createMsgFile(File file,String fileName,List<String> list) {
        String nameDir = file.getAbsoluteFile()+File.separator+fileName;
        File nowFile = new File(nameDir);
        if(nowFile.exists()){
            nowFile.delete();
        }
        BufferedWriter writer = null;
        try {
            writer = new BufferedWriter(new FileWriter(nameDir, true));
        } catch (Exception e) {
            e.printStackTrace();
        }
        for(String str: list){
            try {
                writer.write(str);
                writer.newLine();//写入文件
                writer.flush();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        try {
            writer.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        String dir =  "D:\\recv\\data\\raw";
        File file= new File(dir);
        List<Map<String,String>> lists = new ArrayList<>();
        Map<String,String> map = Maps.newHashMap();
        map.put("var0","vehicleType");
        map.put("var1","vehicleId");
        map.put("var2","enTime");
        map.put("var3","enStationId");
        map.put("var4","enTollStationName");
        map.put("var5","enTollLaneId");
        lists.add(map);
        Map<String,String> map1 = Maps.newHashMap();
        map1.put("var0","1");
        map1.put("var1","默A00000_9");
        map1.put("var2","2020-05-22 10:18:47");
        map1.put("var3","G0422440020010");
        map1.put("var4","仑头");
        map1.put("var5","xxx");
        lists.add(map1);
        FileUtils.circleMethod(file,"ENTRY.dat",lists);
    }

}
